DMKastmaria
First Post
A Cleric is a Caster who serves a Deity.
A Paladin is a Warrior who serves a Deity.
There is no reason to impose narrow interpretations on either.
Except for definition, etymology, history, etc.
Aside from that, and as far as D&D goes, the Paladin was introduced into the game as an archetype representing the epitome of knightly virtues.
I don't know where 4e took clerics, but in every other edition they are holy warriors. 2nd best attack progression. Armor wearing, weapon toting fanatical holy warriors.

Introducing the Paladin does cause some problems. They were originally, what amounts to a prestige class for Fighters. Introduced in the Greyhawk Supplement.
There's certainly no reason you can't have another "holy warrior" type class, other than the cleric, for non LG types.
But, calling it a Paladin is sloppy. Inaccurate.
And completely ignores the very meaning of the word.